34 results about "Plasmon excitation" patented technology

The information recording medium accosting to the preferred embodiment of the present invention achieves high-speed, high-density recording. The layer, in which ultra-particles made from an optical absorption metal, dielectric, or recording material are formed into regular arrays, is deposited. Resonant Plasmon excitation and resonance absorption of ultra-particles enable the edges of the recorded marks to be identified clearly and intense absorption to occur only in the given layer depending on the wavelength in the case of the multi-layer medium, achieving high-density, large-capacity recording.

Disclosed is an optical element that includes: a light guide body into which light from a light-emitting element enters; carrier generation layer (6) formed in the light guide body, in which carriers are generated by the light from the light guide body; plasmon excitation layer (8) stacked on carrier generation layer (6), which has a plasma frequency higher than the frequency of light generated when carrier generation layer (6) is excited by the light from the light-emitting element; and wave vector conversion layer (10) stacked on plasmon excitation layer (8), which converts light incident from plasmon excitation layer (8) into light having a predetermined exit angle to output the light. Plasmon excitation layer (8) is sandwiched between low dielectric constant layer (7) and high dielectric constant layer (9).

Light source layer (4) includes substrate (10) and a pair of layers, namely, hole-transport layer (11) and electron-transport layer (13), formed on substrate (10). Directional control layer (5) includes plasmon excitation layer (15) stacked on a side of light source layer (4), which is opposite to the side of substrate (10) of light source layer (4), and which has a plasma frequency higher than a frequency of light output from light source layer (4), and wave vector conversion layer (17) stacked on plasmon excitation layer (15), which converts light incident from plasmon excitation layer (15) into light having a predetermined exit angle to output the light. Plasmon excitation layer (15) is sandwiched between low dielectric constant layer (14) and high dielectric constant layer (16).

Disclosed is an optical element that includes: carrier generation layer (16) in which carriers are generated by light from light guide body (12) into which light from a light-emitting element enters; plasmon excitation layer (17) that has a plasma frequency higher than the frequency of light generated when carrier generation layer (16) is excited by light from the light-emitting element; and wave vector conversion layer (18) that converts surface plasmon generated by plasmon excitation layer (17) light having a predetermined exit angle to output the light. Plasmon excitation layer (17) is sandwiched between two layers having dielectric properties. The effective dielectric constant of the incident side portion of plasmon excitation layer (17) including an entire structure stacked above light guide body (12) side is higher than that of the exit side portion of plasmon excitation layer (17) including the entire structure stacked above wave vector conversion layer (18) side and the medium in contact with wave vector conversion layer (18).

A system and method for generating and using broadband surface plasmons in a metal film for characterization of analyte on or near the metal film. The surface plasmons interact with the analyte and generate leakage radiation which has spectral features which can be used to inspect, identify and characterize the analyte. The broadband plasmon excitation enables high-bandwidth photonic applications.

Dimensional parameters of metal-containing structures such as films, interconnects, wires and stripes, and nanoparticles are detected using an approach involving plasmon-excitation and one or more metal-constituency characteristics of the metal-containing structures. According to an example embodiment of the present invention, plasmon-exciting light is used to excite plasmons in a structure, the plasmon excitation being responsive to the metal constituency. A characteristic of light reflected from the structure is then used to detect dimensional parameters of the structure. In one implementation, a characteristic of the reflected light that is related to the state of plasmon excitation in the structure is used to detect the dimensional parameters. In another implementation, the angle of incidence of the plasmon-exciting light is used in connection with an intensity-related characteristic of light reflected from structure to detect one or more dimensions of the structure. In still another implementation, the intensity of different wavelengths of the reflected light is used to determine one or more dimensions of the structure. With these approaches, the dimensions of a variety of structures such as metal films, interconnects, wires, and stripes are determined.

The present invention includes light valve section (10) having a plurality of shutter mechanisms (14) that switch between a transmitting state and a shading state of light emitted from light emitting element (25); and substrate (16) through which light that exits plurality of shutter mechanisms (14) is transmitted. The display element also has plasmon coupling section (11) that causes plasmon coupling to occur with light that exits the light valve section (10). Plasmon coupling section (11) includes carrier generation layer (17) that generates carriers with incident light that exits light valve section (10), plasmon excitation layer (19) that has a higher plasma frequency than the frequency of light that is generated in carrier generation layer (17) excited with the light emitted from light emitting element (25), and wave number vector conversion layer (22) that converts the light or surface plasmons generated in plasmon excitation layer (19) into light having a predetermined exit angle. Plasmon excitation layer (19) is sandwiched between first dielectric constant layer (18) and second dielectric constant layer (22).

Provided is an optical element that highly efficiently radiates light with high directivity at low etendue. The optical element includes a light emission layer (103) generating an exciton to emit light, a plasmon excitation layer (105) having a higher plasma frequency than a light emission frequency of the light emission layer (103), an output layer (107) converting light or a surface plasmon generated on an upper surface of the plasmon excitation layer (105) into light with a predetermined output angle to output the light, and a dielectric layer (102). In the optical element, a real part of an effective dielectric constant with respect to the surface plasmon is higher in an upper side portion than the plasmon excitation layer (105) than in a lower side portion than the plasmon excitation layer (105); a dielectric constant with respect to the light emission frequency of the light emission layer (103) is higher in a lowest layer than in a layer adjacent to a lower side of the plasmon excitation layer (105); and assuming that a radiation angle of a surface plasmon-derived highly directional radiation from the plasmon excitation layer (105) to the output layer (107) side is θ_out,spp and a radiation angle of an optical waveguide fundamental mode-derived highly directional radiation is θ_out,light, an absolute value of a difference between the θ_out,spp and the θ_out,light is less than 10 degrees.

The invention provides new types of plasmon-driven growth mechanism for silver nanostructures involving the fusion of triangular nanoprisms. This mechanism, which is plasmon excitation-driven and highly cooperative, produces bimodal particle size distributions. In these methods, the growth process can be selectively switched between bimodal and unimodal distributions using dual beam illumination of the nanoparticles. This type of cooperative photo-control over nanostructure growth enables synthesis of monodisperse nanoprisms with a preselected edge length in the 30-120 nm range simply by using one beam to turn off bimodal growth and the other (varied over the 450-700 nm range) for controlling particle size.

The invention discloses a WO3-x nanosheet photocatalyst with visible light region LSPR absorption as well as a preparation method and application thereof. Tungsten powder, hydrogen peroxide and isopropanol are used as raw materials, a solvothermal method is adopted for preparing a nano tungsten oxide hydrate, then high-temperature reduction is performed to obtain the WO3-x nanosheet photocatalyst,so that LSPR absorption and regulation of WO3-x in a visible light region are achieved, wherein the absorption peak wavelength is smaller than 520 nm. The preparation method comprises the following steps: S1, mixing tungsten powder and a hydrogen peroxide aqueous solution, reacting, adding isopropanol, and heating the reactants to 150-170 DEG C in a high-pressure kettle for reaction to obtain a nano tungsten oxide hydrate; and S2, adding the nano tungsten oxide hydrate in a reducing atmosphere, and carrying out heat treatment to obtain the WO3-x nanosheet photocatalyst with visible light region LSPR absorption. The obtained catalyst has strong LSPR absorption in the whole visible light region, thermal charges generated by plasmon excitation can directly catalyze and degrade organic matters, and the catalytic degradation rate of methyl orange can reach 93%.